IXFE44N60 Equivalent & Substitute Parts

Part Overview

The IXFE44N60 is an N-Channel 600V 41A MOSFET manufactured by IXYS in the HiPerFET™ series, housed in a SOT-227B chassis mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part delivers 500W maximum power dissipation and operates across the industrial temperature range of -55°C to 150°C.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	600	V
Continuous Drain Current (Id) @ 25°C	41	A (Tc)
On-State Resistance (Rds On Max)	130	mOhm @ 22A, 10V
Gate Threshold Voltage (Vgs(th) Max)	4.5	V @ 8mA
Gate Charge (Qg Max)	330	nC @ 10V
Input Capacitance (Ciss Max)	8900	pF @ 25V
Power Dissipation (Max)	500	W (Tc)
Operating Temperature Range	-55 to 150	°C (TJ)
Mounting Type	Chassis Mount	-
Package Type	SOT-227-4, miniBLOC	-

Substitute Part Grouping Explanation

Substitution of the IXFE44N60 is determined by strict alignment of the following critical electrical and mechanical parameters:

Mandatory Matching Parameters:

Drain to Source Voltage (Vdss): 600V
Mounting Type: Chassis Mount
Package Family: SOT-227-4 or ISOTOP® (mechanically compatible variants)
Operating Temperature Range: -55°C to 150°C minimum

Performance Alignment Parameters:

Continuous Drain Current (Id): 39A to 43A range
On-State Resistance (Rds On): 110mOhm to 130mOhm
Gate Threshold Voltage (Vgs(th)): 4V to 5V
Power Dissipation: 460W to 565W

All substitute parts listed meet or exceed the IXFE44N60 electrical specifications within the defined parameter windows. Substitutes are sourced from active product lines with current manufacturing status and full compliance certifications.

Parameter Comparison

Parameter	IXFE44N60	APL602J	APT39F60J	APT6013JFLL	APT6013JLL	STE40NC60
Manufacturer	IXYS	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	STMicroelectronics
Product Status	Obsolete	Active	Active	Active	Active	Active
Vdss (V)	600	600	600	600	600	600
Id @ 25°C (A Tc)	41	43	42	39	39	40
Rds On Max (mOhm)	130 @ 22A, 10V	125 @ 21.5A, 12V	110 @ 28A, 10V	130 @ 19.5A, 10V	130 @ 19.5A, 10V	130 @ 20A, 10V
Vgs(th) Max (V)	4.5 @ 8mA	4 @ 2.5mA	5 @ 2.5mA	5 @ 2.5mA	5 @ 2.5mA	4 @ 250µA
Qg Max (nC)	330 @ 10V	Not specified	280 @ 10V	130 @ 10V	130 @ 10V	430 @ 10V
Ciss Max (pF)	8900 @ 25V	9000 @ 25V	11300 @ 25V	5630 @ 25V	5630 @ 25V	11100 @ 25V
Power Dissipation Max (W Tc)	500	565	480	Not specified	460	460
Operating Temperature (°C TJ)	-55 to 150	-55 to 150	-55 to 150	Not specified	-55 to 150	150
Mounting Type	Chassis Mount	Chassis Mount	Chassis Mount	Chassis Mount	Chassis Mount	Chassis Mount
Package	SOT-227-4, miniBLOC	ISOTOP®	ISOTOP®	ISOTOP®	ISOTOP®	ISOTOP
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Inventory Status	688 Pcs New Original	1752 Pcs New Original	953 Pcs New Original	636 Pcs New Original	716 Pcs New Original	984 Pcs New Original

Engineering Selection Recommendations

Primary Substitute: APL602J (Microchip Technology)

The APL602J is the highest-performance substitute, offering 43A continuous drain current and 565W power dissipation. This part exceeds IXFE44N60 specifications across all critical parameters while maintaining identical 600V Vdss rating and chassis mount configuration. Active product status with ROHS3 compliance and 1752 units in stock provide supply continuity and regulatory alignment.

Secondary Substitute: APT39F60J (Microchip Technology)

The APT39F60J delivers superior on-state resistance performance at 110mOhm and operates within the POWER MOS 8™ series. With 42A continuous drain current and 480W power dissipation, this part meets all IXFE44N60 functional requirements. Active status and ROHS3 compliance support long-term design viability.

Tertiary Substitutes: APT6013JFLL and APT6013JLL (Microchip Technology)

Both APT6013 variants provide 39A continuous drain current with matched 130mOhm on-state resistance. The APT6013JLL includes full power dissipation specification (460W) and complete temperature range documentation (-55°C to 150°C). These parts operate within the POWER MOS 7® series with ROHS3 compliance and active manufacturing status.

Alternative Substitute: STE40NC60 (STMicroelectronics)

The STE40NC60 from the PowerMESH™ II series delivers 40A continuous drain current and 460W power dissipation. This part maintains electrical equivalence with the IXFE44N60 while offering ROHS3 compliance and active product status. Note: Operating temperature specification lists 150°C maximum without lower bound documentation.

All substitute parts carry REACH Unaffected status and EAR99 export classification matching the original IXFE44N60.

Frequently Asked Questions (FAQ)

Q: Can the APL602J directly replace the IXFE44N60 in existing designs?

A: The APL602J meets all critical electrical parameters (600V Vdss, 41A+ Id, 130mOhm Rds On, -55°C to 150°C operating range) and shares chassis mount configuration. Package compatibility requires verification: IXFE44N60 uses SOT-227-4 miniBLOC while APL602J uses ISOTOP®. Physical footprint and pinout alignment must be confirmed before board-level substitution.

Q: What is the difference between APT6013JFLL and APT6013JLL?

A: Both parts deliver identical electrical performance (39A Id, 130mOhm Rds On, 130nC Qg, 5630pF Ciss). The APT6013JLL includes complete power dissipation specification (460W) and documented operating temperature range (-55°C to 150°C), while APT6013JFLL omits these parameters in the provided data. APT6013JLL is preferred for applications requiring full thermal and power budget documentation.

Q: Why does STE40NC60 show only 150°C maximum temperature without a minimum?

A: The provided specification for STE40NC60 lists 150°C as the operating temperature ceiling. Standard industrial MOSFET operation extends to -55°C minimum; however, the lower bound is not explicitly documented in the available data. Design validation against STMicroelectronics datasheets is required for temperature-critical applications.

Q: Are all substitute parts RoHS compliant?

A: All five substitute parts carry ROHS3 Compliant certification. The original IXFE44N60 RoHS status is not specified in the provided data. All substitutes and the original part maintain REACH Unaffected status.

Q: Which substitute offers the best on-state resistance performance?

A: The APT39F60J delivers the lowest on-state resistance at 110mOhm (measured at 28A, 10V gate voltage). This represents a 15% improvement over the IXFE44N60 baseline of 130mOhm, reducing conduction losses in high-current applications.

Q: What is the gate charge difference between substitutes?

A: Gate charge varies significantly: APT6013JFLL and APT6013JLL specify 130nC (lowest), APT39F60J specifies 280nC, IXFE44N60 specifies 330nC, and STE40NC60 specifies 430nC (highest). Lower gate charge reduces driver power requirements and switching losses. APL602J gate charge is not specified in the provided data.

Q: Can I use these substitutes in parallel configurations?

A: Parallel operation requires matched Rds On characteristics and gate threshold voltages to ensure balanced current distribution. APT6013JFLL, APT6013JLL, and STE40NC60 all specify 130mOhm Rds On with similar Vgs(th) values (4V to 5V), supporting parallel configurations. APL602J (125mOhm) and APT39F60J (110mOhm) exhibit lower resistance and require careful current-sharing analysis.

Q: What inventory availability should I consider?

A: Current stock levels are: APL602J (1752 units), STE40NC60 (984 units), APT39F60J (953 units), APT6013JLL (716 units), and APT6013JFLL (636 units). The original IXFE44N60 maintains 688 units in stock despite obsolete status. Long-term design transitions should prioritize active-status substitutes with higher inventory depth.

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